David Laszlo Tarnoki1, Adam Domonkos Tarnoki1, Levente Littvay2, Zsofia Lazar3, Kinga Karlinger1, Andrea Agnes Molnar4, Dora Melicher5, Zsolt Garami6, Viktor Berczi1, Ildiko Horvath3. 1. Department of Radiology and Oncotherapy, Semmelweis University, Budapest, Hungary. 2. Central European University, Budapest, Hungary. 3. Department of Pulmonology, Semmelweis University, Budapest, Hungary. 4. Research Group for Inflammation Biology and Immunogenomics of Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary; Department of Cardiology, Military Hospital, Budapest, Hungary. 5. Department of Genetics, Cell and Immunobiology, Semmelweis University, Budapest, Hungary. 6. The Methodist Hospital, DeBakey Heart and Vascular Center, Houston, TX, USA.
Abstract
INTRODUCTION AND OBJECTIVE: The role of genetic factors in nicotine dependence is well understood, but no information is available on the inheritability of second-hand smoke (SHS) exposure sensitivity and their co-variance. MATERIALS AND METHODS: 186 adult same-gender pairs of twin (146 monozygotic, 40 dizygotic; 44±17 years±SD) completed a questionnaire. RESULTS: The model showed a significant role of unshared environmental factors influencing the co-variance between smoking habit and SHS sensitivity (re=-0.191, 95% CI, -0.316 to -0.056, or the total phenotypic correlation of rph=-0.406, p<0.001) without evidence for genetic covariation. Age, gender and country-adjusted analysis indicated 51.5% heritability for smoking habit (95% confidence interval/CI/, 6.2 to 89.8%), 49.7% for SHS sensitivity (95%CI, 19.1-72.0%), 35.5% for general opinions on SHS exposure in restaurants/cafés (95%CI, 10.7-58.6%), and 16.9% in pubs/bars (95%CI, 0.0-49.0%). CONCLUSIONS: The co-variance between SHS sensitivity and smoking habits is driven mainly by the unshared environment. SHS sensitivity is moderately inheritable. The considerable influence of environmental factors on general opinions on SHS exposure in designated indoor public venues emphasizes the importance of smoking bans and health behaviour interventions at the individual level in developing an anti-smoking attitude.
INTRODUCTION AND OBJECTIVE: The role of genetic factors in nicotine dependence is well understood, but no information is available on the inheritability of second-hand smoke (SHS) exposure sensitivity and their co-variance. MATERIALS AND METHODS: 186 adult same-gender pairs of twin (146 monozygotic, 40 dizygotic; 44±17 years±SD) completed a questionnaire. RESULTS: The model showed a significant role of unshared environmental factors influencing the co-variance between smoking habit and SHS sensitivity (re=-0.191, 95% CI, -0.316 to -0.056, or the total phenotypic correlation of rph=-0.406, p<0.001) without evidence for genetic covariation. Age, gender and country-adjusted analysis indicated 51.5% heritability for smoking habit (95% confidence interval/CI/, 6.2 to 89.8%), 49.7% for SHS sensitivity (95%CI, 19.1-72.0%), 35.5% for general opinions on SHS exposure in restaurants/cafés (95%CI, 10.7-58.6%), and 16.9% in pubs/bars (95%CI, 0.0-49.0%). CONCLUSIONS: The co-variance between SHS sensitivity and smoking habits is driven mainly by the unshared environment. SHS sensitivity is moderately inheritable. The considerable influence of environmental factors on general opinions on SHS exposure in designated indoor public venues emphasizes the importance of smoking bans and health behaviour interventions at the individual level in developing an anti-smoking attitude.
Authors: Cosmas M Zyambo; James H Willig; Karen L Cropsey; April P Carson; Craig Wilson; Ashutosh R Tamhane; Andrew O Westfall; Greer A Burkholder Journal: J AIDS Clin Res Date: 2015-07-09